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Rio_ said:
Dad takes cod liver oil capsules, and they're pretty big...I'm guessing they can't be chewed , but I could practise with them.

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Check out the "kind" of acid; think about it, "citric acid" is vitamin C and you drink it in orange juice everyday :-)

I don't recommend practicing on cod liver oil capsules; I got the brilliant idea in my early 20s that since it was "good" for you and our grandparents took it as children that I could take it no matter how bad it tasted. I put a spoonful in my mouth and spit it out all over the mirror in a fast, high projectile stream :-) I've NEVER tasted anything so nasty in my life!!! LOL, it stinks too and I wasn't able to clean it all up easily as it got everywhere in my bathroom and from then on, going into the bathroom I could smell it and would practically gag.